Earphone battery quick dismounting structure based on electromagnetic control

Abstract

The utility model discloses a battery quick dismounting structure contains the main part, battery support, first casing that connect gradually, wherein the main part built -in mainboard provides circuit basic support, and battery support is used for bearing battery and realizes the electric connection of battery and mainboard, and the inside of first casing is equipped with the buckle, can cooperate with the notching of battery support and realize the preliminary fixation, and still designed the fixed structure spare that constitutes by electromagnetic component and card needle, and the main part is equipped with the locking mouth, and the card needle can be with the locking mouth movable insertion joint to realize the locking, and the one end of electromagnetic component is fixed in first casing, and the other end is with mainboard movable electric connection. When working, through pressing first casing, triggers electromagnetic component electrification and produces magnetism, and magnetic attraction card needle makes it with the locking mouth and separates, completes the unlocking. The utility model discloses through the locking logic of electromagnetic component and card needle, replaces traditional screw lock or pure mechanical buckle, need not special tool to realize dismounting, and the unlocking mode operation is simple, and the user experience is good.

Description

Technical Field

[0001] This utility model relates to the field of wearable audio device technology, specifically to a quick-release structure for headphone batteries based on electromagnetic control. Background Technology

[0002] Currently, wearable audio devices (such as TWS earphones and headphones) have become a core category in the consumer electronics field. With their portability, wireless connectivity, and high-quality sound, their global annual shipments have exceeded 1 billion units. However, the battery, as a core energy component, typically has a lifespan of 2-3 years (it needs to be replaced when its capacity decays to below 80% of its initial value), which is much shorter than the lifespan of more than 5 years for structural components such as the earphone shell and sound unit. Traditional earphones mostly adopt a "built-in non-removable battery" design, where the battery is fixed in the shell by glue, micro-screws, or complex clips, making it impossible for users to replace it themselves. They can only rely on after-sales repair, which not only requires them to bear the repair costs but also requires waiting for a processing cycle of 3-7 days. Some users simply discard their old earphones and buy new ones due to the high repair costs or long waiting times, generating tens of millions of electronic waste units every year, which contradicts the global concept of "sustainable development."

[0003] In recent years, various countries have successively introduced mandatory regulations to promote the upgrading of "repairability" of electronic devices. The EU Regulation on the Development of Sustainable Product Ecodesign Requirements (EU2023 / 1791), which came into effect in 2023, explicitly requires that the batteries of wearable devices must be "removable by the user or with simple tools" and that disassembly must not damage the main structure. California's Right to Repair Electronic Devices Act, implemented in 2024, also mandates that manufacturers provide removable battery designs. China's "Guiding Opinions on Strengthening Green Consumption" also lists "repairability and recyclability" as core evaluation indicators for electronic devices. However, driven by regulations, existing removable battery solutions still have many insurmountable defects: for example, screw-locking solutions require a special PH000 screwdriver for disassembly, micro screws are prone to stripping and loss, and screw holes are prone to accumulating sweat and dust, leading to corrosion and making disassembly impossible. Furthermore, the reserved screw posts occupy battery space, reducing the battery capacity of TWS earphones. Purely mechanical snap-fit ​​solutions use ABS / PC plastic snap-fits, which require prying for disassembly, and the plastic snap-fits are prone to fatigue and breakage after repeated opening and closing. In summary, existing solutions cannot simultaneously meet the requirements of "regulatory compliance, low cost, high reliability, good user experience, and small size." Developing a quick-release structure for headphone batteries that takes into account multiple dimensions of needs has become an urgent problem to be solved in the industry. Utility Model Content

[0004] The present invention aims to overcome at least one of the defects of the prior art and provide a quick-release structure for headphone batteries based on electromagnetic control, so as to achieve convenient battery removal without the need for tools.

[0005] This utility model protects a quick-release battery structure comprising a main body, a battery bracket, and a first housing connected in sequence. The main body houses a motherboard to provide basic circuit support. The battery bracket carries the battery and enables electrical connection between the battery and the motherboard. The inner side of the first housing has a latch that engages with a slot in the battery bracket for initial fixation. A fixing structure consisting of an electromagnetic component and a locking pin is also included. The main body has a locking slot, and the locking pin can be movably inserted into the locking slot to achieve locking. One end of the electromagnetic component is fixed to the first housing, and the other end is movably electrically connected to the motherboard. During operation, pressing the first housing triggers the electromagnetic component to be energized and generate magnetism, magnetically attracting the locking pin and disengaging it from the locking slot, thus unlocking the battery. This invention replaces traditional screw fastening or purely mechanical clips with a locking logic of electromagnetic components and a locking pin, allowing for disassembly without special tools. This meets the regulatory requirements of the EU and other regions that allow users to disassemble the device themselves, solving the problems of easily stripped screws and easily broken clips. Secondly, the dual fixing design of "clasp and slot cooperation combined with locking pin" improves structural stability and prevents the earphone from falling off or the battery from becoming loose during exercise. At the same time, the press-triggered unlocking method is simple to operate, and the user experience is better than the traditional solution that requires prying.

[0006] In some embodiments of this utility model, the specific structure and energizing logic of the electromagnetic component are further defined: the electromagnetic component is composed of a conductive post, a solenoid assembly, and a conductive piece connected in sequence. The top of the conductive post is fixed to the first housing and can move synchronously with the first housing. One end of the conductive piece is connected to the solenoid assembly, and the other end is connected to the main board. When the first housing is pressed, the end of the conductive post contacts the main board, so that the main board, the conductive post, the solenoid assembly, and the conductive piece form a closed circuit. The solenoid assembly is energized to generate a magnetic field and magnetically attracts the SIM card pin. Therefore, this utility model clarifies the "conduction-energizing" path of the electromagnetic component, which avoids the problem of insufficient power supply to the solenoid due to poor contact compared to the traditional point contact conduction method. As the core of magnetic field generation, the solenoid assembly has a stable magnetic field strength after being energized, which can accurately magnetically attract the SIM card pin to disengage from the locking port, solving the defects of unstable magnetic field and unlocking jamming in complex electromagnetic schemes.

[0007] Furthermore, in the locked state, the magnet and the SIM card pin are magnetically attracted to achieve initial positioning of the SIM card pin. The magnetic force between the magnet and the SIM card pin is less than the magnetic force generated by the solenoid assembly, ensuring that the solenoid assembly can overcome the magnetic force to pull the SIM card pin when unlocking. Therefore, in the locked state, the magnetic attraction of the magnet can stably confine the SIM card pin within the locking port, preventing the SIM card pin from accidentally dislodging from the locking port and causing structural loosening when the earphone is worn daily, exercised, or slightly dropped. This solves the problem of unreliable locking in traditional non-magnetic solutions. Secondly, through the magnetic attraction difference design of "weak magnetic attraction combined with strong attraction of the solenoid assembly", the locking stability in the non-working state is guaranteed, and the solenoid assembly can smoothly pull the SIM card pin when pressing to unlock, avoiding "weak unlocking" or "mistaken locking", thus improving the safety and reliability of the structure.

[0008] Furthermore, this invention refines the electrical connection structure between the motherboard and the electromagnetic component. The motherboard has a first contact and a second contact, with a spring on the first contact. The conductive post connects to the first contact via the spring, and the end of the solenoid assembly connects to the second contact. The addition of the spring allows for flexible conduction using its own elasticity, compensating for assembly errors between the conductive post and the first contact, and maintaining reliable contact through elastic deformation during long-term use, preventing conduction failure due to wear of hard contacts. Dividing the motherboard contacts into first and second contacts, corresponding to the connections of the conductive post and the solenoid assembly respectively, clarifies the circuit path, reduces current interference, and ensures stable magnetic field strength when the solenoid assembly is energized. Simultaneously, the spring also assists in pre-pressuring and fixing the battery bracket to the motherboard, further improving the overall structural compactness and reducing the probability of abnormal noise during operation.

[0009] Furthermore, the conductive plate and solenoid assembly are connected by an elastic connector, clarifying the connection method between them. The elastic connector can absorb vibration and displacement of the structure during assembly or use, such as the impact force when the earphone is dropped or the deformation of the components after long-term use, preventing the rigid connection between the conductive plate and solenoid assembly from loosening or breaking due to vibration, and ensuring the long-term stability of the electrical connection. At the same time, the flexibility of the elastic connector can adapt to the dimensional deviations of different batches of components, improve the assembly qualification rate, reduce circuit breakage problems caused by assembly errors, and reduce the defect rate in the production process.

[0010] More preferably, the elastic connector is defined as a spring pin. As a mature conductive elastic component, the spring pin combines excellent conductivity and elasticity. Compared with ordinary springs or elastic plastic parts, it has higher conductivity and low resistivity when made of copper, which can effectively reduce current loss, ensure stable power supply to the solenoid assembly, and avoid problems such as insufficient magnetic field strength and inability of the pin to disengage due to insufficient current. At the same time, the preload stroke of the spring pin is controllable, which can accurately compensate for the gap between the conductive piece and the solenoid assembly, maintain long-term reliable contact, and has strong wear resistance, which can improve the overall service life of the structure and solve the defects of traditional elastic connectors that are easy to wear and have rapid conductivity decay.

[0011] The solenoid assembly of this utility model includes a solenoid bracket, a solenoid fitting, and copper wire. The solenoid bracket provides installation support, the solenoid fitting serves as a carrier for winding the copper wire, the middle part of the copper wire is spirally wound around the outside of the solenoid fitting, and together with the solenoid fitting, it is nested on the upper end of the solenoid bracket; one end of the chuck is movably sleeved on the lower end of the solenoid bracket, that is, the chuck and the solenoid fitting are on the same longitudinal axis.

[0012] The solenoid bracket is fixed to the first housing; one end of the copper wire is connected to a conductive post, and the other end is connected to an elastic connector. Firstly, the structured design of the solenoid assembly ensures uniform copper wire winding density, resulting in a more concentrated magnetic field distribution after energization. This allows for precise application to the jacking pin, preventing insufficient attraction due to magnetic field dispersion. Furthermore, the solenoid bracket's fixation to the first housing ensures stable relative positions between the solenoid and the jacking pin, further enhancing the accuracy of magnetic unlocking. Secondly, the jacking pin is movably mounted on the lower end of the solenoid bracket, which provides guidance, preventing deviation or jamming during vertical movement and ensuring a smoother unlocking process. This solves the problems of traditional solenoid assemblies lacking guidance and prone to jacking pin jamming. Thirdly, the clear connection path of the copper wire minimizes circuit loss, ensuring the solenoid can quickly generate a sufficient magnetic field.

[0013] More preferably, the first housing has a first and a second latch, both of which are fan-shaped latches with unequal arc lengths, allowing them to engage with the slot of the battery holder for secure fixation. Compared to traditional straight-edge latches, the fan-shaped latches have a larger contact area with the slot and stronger Z-axis fixing force, effectively preventing the first housing from shifting up and down and avoiding abnormal noises from the housing colliding during earphone movement. Furthermore, the unequal arc length design means that unlocking requires only a specific rotation angle to completely misalign the latch with the slot, avoiding the "incomplete misalignment and inability to unlock" problem that easily occurs when the arc lengths are equal. It also limits the rotation stroke, improving the accuracy of the unlocking operation, eliminating the need for repeated adjustments to the rotation angle, resulting in a superior user experience.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention comprehensively solves many shortcomings of existing detachable battery solutions through a structural design that combines electromagnetic control with multi-dimensional fixation. Firstly, it replaces traditional screws, mechanical clips, or single magnetic attraction with electromagnetic components, eliminating the need for special tools and enabling quick disassembly through pressing and rotating. This fully complies with regulations in the EU, US, and other regions, while avoiding problems such as stripped screws, broken clips, and magnetic interference. Secondly, the multi-dimensional fixation design, including the engagement of fan-shaped clips with slots, the insertion of pins into locking ports, magnetic-assisted positioning, and spring pin pre-compression, ensures structural stability. Firstly, the battery is stable and makes no loosening or abnormal noise during movement or drops, ensuring reliable electrical connection between the battery and the motherboard. Secondly, the circuit design uses a combination of conductive posts, springs, dual contacts, and spring pins, resulting in low contact resistance, stable power supply, controllable solenoid magnetic field strength, and fast unlocking response. Thirdly, the structured design of each component, such as the solenoid bracket guide and the differentiated arc length of the fan-shaped buckle, improves assembly accuracy and service life. The overall structure is compact, does not occupy too much battery space, and balances lightweight and battery life requirements. At the same time, it has fewer component types and simpler assembly processes, making it feasible for mass production and valuable for market applications. Attached Figure Description

[0016] Figure 1 This is an exploded view of the overall structure of the quick-disassembly battery structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the fixing structure of the quick-release battery structure of this utility model in the locked state.

[0018] Figure 3 This is a schematic diagram of the first housing and battery bracket of the quick-disassembly structure of the present invention in a disassembled state.

[0019] Figure 4 This is a schematic diagram of the fixing structure of the quick-release battery structure of this utility model installed in the middle shell.

[0020] Figure 5 This is an exploded view of the fixing structure of the quick-release battery structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the fixing structure of the quick-release battery structure of this utility model in the unlocked state. Detailed Implementation

[0022] The accompanying drawings illustrate the technical solutions of this utility model in more detail. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are only some, not all, of the embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application. Example

[0025] This utility model protects a battery quick-release structure based on electromagnetic control, including a main body, a battery bracket 1, a first housing 2, and a main board 3; the main body includes a front housing 4 and a middle housing 5; the main board 3 is disposed on the middle housing 5 and located below the battery bracket 1; the battery 100 is installed in the battery bracket 1 and electrically connected to the main board 3; combined with Figure 2 As shown, the motherboard 3 is provided with a first contact 10 and a second contact 20; the first contact 10 is provided with a spring piece 6.

[0026] like Figure 3 As shown, the inner side of the first housing 2 is provided with a latching part, which includes a first latch 21 and a second latch 22; both the first latch 21 and the second latch 22 are fan-shaped latches, and their arc lengths are not equal. The battery bracket 1 is provided with a slot 11 that matches the first latch 21 and the second latch 22; the battery bracket 1 has a circular battery cavity inside, and the two slots 11 are located on the diameter axis of the circular battery cavity.

[0027] like Figures 1-2 As shown, the main inventive point of this utility model lies in the design of a fixing structural component, combined with... Figure 4 As shown, the middle shell 5 is provided with a locking port 51; as Figure 2 As shown, the fixing structure includes an electromagnetic component 7 and a pin 8; combined with Figure 4 As shown, the electromagnetic component 7 is composed of a conductive post 71, a solenoid assembly 72, a spring pin 73, and a conductive piece 74 connected in sequence. The top end of the conductive post 71 is fixed to the first housing 2 and can move synchronously with the first housing 2. One end of the conductive piece 74 is connected to the spring pin 73, and the other end is connected to the second contact 20 of the main board 3. The conductive post 71 is connected to the first contact 10 through the spring piece 6. When the first housing 2 is pressed, the end of the conductive post 71 contacts the first contact 10 of the main board 3, so that the main board 3, the conductive post 71, the solenoid assembly 72, the spring pin 73, and the conductive piece 74 form a closed circuit. The solenoid assembly 72 is energized to generate a magnetic field and magnetically attracts the pin 8.

[0028] like Figure 5 As shown, the solenoid assembly 72 includes a solenoid bracket 721, a solenoid fitting 722, and a copper wire 723. The solenoid bracket 721 provides installation support, the solenoid fitting 722 serves as the winding carrier for the copper wire 723, and the middle part of the copper wire 723 is spirally wound around the outside of the solenoid fitting 722, and together with the solenoid fitting 722, it is nested at the upper end of the solenoid bracket 721. One end of the locating pin 8 is movably sleeved on the lower end of the solenoid bracket 721, that is, the locating pin 8 and the solenoid fitting 722 are on the same longitudinal axis.

[0029] Combination Figures 5-6 As shown, by pressing the first housing 2, the conductive post 71 is connected to the first contact 10, and the solenoid 722 generates a magnetic field and magnetically attracts the jack 8, so that the jack 8 is disengaged from the locking port 51 to achieve unlocking.

[0030] In this embodiment, combined with Figure 2 , Figures 5-6 As shown, a magnet 9 is also designed in the middle shell 5. In the locked state, the magnet 9 is magnetically attracted to the SIM card pin 8. The magnetic attraction between the magnet 9 and the SIM card pin 8 is less than the magnetic attraction between the solenoid assembly 72 and the SIM card pin 8 when the solenoid assembly 72 generates a magnetic field.

[0031] Combination Figures 1-6 As shown, when removing the battery, first press the first housing 2. The first housing 2 drives the inner fixed conductive post 71 to move down synchronously. The end of the conductive post 71 connects with the first contact point 10 of the main board 3 through the spring piece 6, so that the main board 3, conductive post 71, solenoid assembly 72, spring pin 73, and conductive piece 74 form a closed circuit. The solenoid assembly 72 generates a magnetic field when energized, which overcomes the attraction of the magnet 9 inside the main body to the locating pin 8, and pulls the locating pin 8 away from the locking port 51 of the main body. Then rotate the first housing 2 so that the fan-shaped buckle inside the first housing 2 comes out of the slot 11 of the battery bracket 1. At this time, the first housing 2 can be removed, and the battery to be replaced can be taken out from the battery bracket 1. During battery assembly, the new battery is first placed into the battery bracket 1 to ensure electrical connection between the battery and the motherboard 3. Then, the fan-shaped buckle of the first housing 2 is inserted into the slot 11 of the battery bracket 1. The first housing 2 is rotated to achieve misalignment between the buckle and the slot 11, thus achieving initial fixation. At the same time, the locking pin 8 is inserted into the locking slot 51 of the main body under the combined action of the magnetic attraction of the magnet 9 and gravity, completing the overall locking. The battery assembly process is now complete.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model should not depart from the spirit and scope of this utility model. Those skilled in the art can also make other changes within the spirit of this utility model for its design, as long as they do not deviate from the technical effect of this utility model. These changes made according to the spirit of this utility model should all be included within the scope of protection claimed by this utility model.

Claims

1. A battery quick-release structure based on electromagnetic control, characterized in that, It includes a main body component, a battery bracket (1), and a first housing (2) connected in sequence; The main body also includes a motherboard (3); The battery is installed in the battery bracket (1) and electrically connected to the motherboard (3); The first housing (2) has a snap-fit ​​part on its inner side, and the battery bracket (1) has a slot (11) that matches the snap-fit ​​part; It also includes fixed structural components; The fixing structure includes an electromagnetic component (7) and a pin (8); The main body is provided with a locking notch (51); One end of the electromagnetic component (7) is mounted on the first housing (2); the other end is electrically connected to the main board (3); one end of the jack (8) is movably connected to the electromagnetic component (7), and the other end is movably inserted into the locking port (51); By pressing the first housing (2), the electromagnetic component (7) is energized and magnetically attracts the SIM card pin (8), thereby disengaging the SIM card pin (8) from the locking port (51) to unlock the device.

2. The battery quick-release structure according to claim 1, characterized in that, The electromagnetic component (7) includes a conductive post (71), a solenoid assembly (72), and a conductive piece (74) connected in sequence. The top end of the conductive post (71) is fixed to the first housing (2). One end of the conductive piece (74) is connected to the solenoid assembly (72), and the other end is connected to the main board (3). When the first housing (2) is pressed, the end of the conductive post (71) is electrically connected to the main board (3), causing the solenoid assembly (72) to generate a magnetic field and magnetically attract the SIM card pin (8).

3. The battery quick-release structure according to claim 2, characterized in that, It also includes a magnet (9), which is disposed in the main body. In the locked state, the magnet (9) is magnetically attracted to the pin (8). The magnetic attraction between the magnet (9) and the pin (8) is less than the magnetic attraction between the solenoid assembly (72) and the pin (8) when the solenoid assembly (72) generates a magnetic field.

4. The battery quick-release structure according to claim 2, characterized in that, The motherboard (3) is provided with a first contact (10) and a second contact (20); the first contact (10) is provided with a spring piece (6), the conductive post (71) is connected to the first contact (10) through the spring piece (6), and the end of the solenoid assembly (72) is connected to the second contact (20).

5. The battery quick-release structure according to claim 2, characterized in that, The conductive piece (74) is connected to the solenoid assembly (72) via an elastic connector.

6. The battery quick-release structure according to claim 5, characterized in that, The elastic connector is a spring pin (73).

7. The battery quick-release structure according to claim 5, characterized in that, The solenoid assembly (72) includes a solenoid bracket (721), a solenoid fitting (722), and a copper wire (723); The middle part of the copper wire (723) is spirally wound around the outside of the solenoid fitting (722) and nested together with the solenoid fitting (722) at the upper end of the solenoid bracket (721); one end of the chuck (8) is movably sleeved on the lower end of the solenoid bracket (721); The solenoid bracket (721) is fixed to the first housing (2); One end of the copper wire (723) is connected to the conductive post (71), and the other end is connected to the elastic connector.

8. The battery quick-release structure according to claim 1, characterized in that, The buckle part includes a first buckle (21) and a second buckle (22); both the first buckle (21) and the second buckle (22) are fan-shaped buckles, and their arc lengths are not equal.

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